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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

AC0FS callsign genealogy

Currently held by Carlson Jr, Kenneth G

The FCC publishes a previous_call_sign on every amateur license — a self-link to the licensee's prior callsign. Following those links produces the chain below.

Previous callsigns

Older callsigns held by AC0FS's current licensee, walking backwards.

  1. K0FAScancelled· E
    Steinhaus, Fredrick AMNgranted 2014-02-04cancelled 2019-08-03
  2. KD0YTNcancelled· T
    Steinhaus, Fredrick AMNgranted 2014-01-15cancelled 2014-02-04

Successor callsigns

Callsigns held now by people who previously held AC0FS.

  1. WA0SQWactive· E
    Carlson Jr, Kenneth GMNgranted 2017-10-26

All historical holders

Every license row we've seen with the callsign AC0FS, oldest first.

  • Carlson Jr, Kenneth G MN
    2001-04-26 → cancelled 2007-11-02
  • Steinhaus, Fredrick A MN
    2019-08-03 active
← Back to AC0FS License history →